| 摘要 |
A tubular member has: a shear valve fitting hole that is open on an axial end face of the tubular member in an axial direction of the tubular member, and that extends in the axial direction; and a liquid charging passage that extends in a radial direction of the tubular member from the shear valve fitting hole to an outermost peripheral face of the tubular member, and that opens on the outer peripheral face of the tubular member. One end portion of a tube of a shear valve fitted in the shear valve fitting hole projects outward in the axial direction from an axial end face of the tubular member. The shaft member has a tube shearing portion that is overlapped with the other end portion of the tube in the circumferential direction of the shaft member when a load equal to or higher than a prescribed value is applied. |
